Condenser system and vacuum-pump



P. P. BOURNE.

CONDENSER SYSTEM AND VACUUM PUMP.

APPLICATION FILED MAY 23, 1919.

- 1,335,478. 7 Patented Mar. 30,1920.

2 SHEETS-SHEET I.

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CONDENSER SYSTEM AND VACUUM PUMP,

APPLICATION FILED MAY 23, 1919. I r

Patentqd Mar. 30,1920.

2 SHEETSLSHEET 2.

UNITED STATES PATENT OFFICE.

PHILLIPS P. BOURNE, OF WINCHESTER, MASSACHUSETTS, ASSIGNOR TOWORTHINGTON PUMP AND MACHINERY CORPORATION, OF NEW YORK, N. Y., ACORPORATION OF VIRGINIA.

' CONDENSER SYSTEM AND VACUUM-PUMP.

Application filed May 23, 1919.

To all whom it may concern Be it known that I, PHILLIPS P. BOURNE, acitizen of the United States, residing at Winchester, county ofMiddlesex, and'State of Massachusetts, have invented certain new anduseful Improvements in Condenser Systems and Vacuum-Pumps, fullydescribed and represented in the following specification and theaccompanying drawings, forming a part of the same.

This invention relates to vacuum pumping apparatus. of the classemployed in connection with steam cOIldeIlSiIlg systems, andespecially'to that type of apparatus known as dry and wet air pumps, inwhich one end of the cylinder receives the air-and uncondensed vapor andthe other end the discharge water, that is the water of condensation insurface condensing systems, for

which the invention is especially intended, although applicable also tojet condensing systems.

The especial object of the invention is to provide a condensing systemof this class in which the pump shall be simple, reliable. andeconomically operated. and a system by which a high volumetricefficiency and vacuum may be maintained, with a vacuum pumping apparatusof small size and low cost.

For a full understanding of the invention,

a detailed description of condenser systems.

in preferred forms as applied in connection with surface condensers,will now be given, in connection with the accompanying drawings forminga part of this specification, and the features forming the inventionthen specifically pointed out in the claims.

In the drawings- .Figure 1 is a side elevation of a surface condensersystem, with the pump and cooler in section. showing a preferredconstruction in which the air and uncondensed vapor are taken off thecondenser separately from the water of condensation;

Fig. 2 is a similar partial view showing a construction in which the airand uncondensed vapor are takenofl' the condenser with the water ofcondensation, and

Fig. 3 is a view similar to Fig. 1, showing the invention applied inconnection with a horizontal pump.

Reierrmg to the drawings, and especially to Fig. 1. A is a surfacecondenser shown as of a well-known type; B the tail pipe forSpecification of Letters Patent. Patented Blair. 30, 1920.

Serial No. 299,320.

the water of condensation, and C the air der F receives the water ofcondensation from tail pipe B through base suction chamber 10, and theusual suction valves 11, and

discharges below the piston through force valves '12, discharge chamber13 and dis charge pipe 14. The cylinder F also receives above the pistonG the air and uncondensed vapor from pipe 0 through inlet chamber 15 andinlet ports 16', this air and vapor inlet preferably being valveless andadapted to be opened by the piston G at the end of its downward strokefor suction and closed by the piston on reversal for discharge on theupward stroke, such discharge being through valves 17 in the cylinderhead.

This condensing systemand vacuum pump, so far as above described, iswell known, so that no further description of its construction oroperation, except so far as concerns features added in accordance with"the present invention, is required.

Referring now to these features, the air and uncondensed vapor from thecondenser is not discharged to the atmosphere by the piston on itsupward stroke, but is discharged from the ports controlled by valve 17to a head discharge chamber closed 'to the atmosphere and through apassage 18, shown as cast in the cylinder but which may be formed by apipe or in any other suit able manner, to ports 19 opening into thecylinder below the piston so as to be opened by the piston'at or nearthe end of its upward stroke and closed by the piston at or near thebeginning of its downward stroke. The air and unco'ndensed vapor,therefore, are not delivered against atmospheric pressure by the pistonon its upward stroke, butare delivered only against the reduced suction.pressure in cylinder F below the piston. The discharge chamber abovevalves 17 and passage 18 are made of such capacity as to 1 avoid largecompression before the port 19 is opened. The air and uncondensed vaporthus transferred to the cylinder below the piston are compressed anddischarged with the Water of condensation through valves 12 on thedownward-stroke of' the piston.

It is desirable that the temperature of the air in the upper end ofthecylinder should be .kept low, as cooled theair cooler in the condenser,for the purpose of reducing the air volume and aidlng in thecondensation of the vapor, and for this purpose the water, preferablyinjected into the air end for the purpose of filling the clearancespaces and sealing the piston and air dis-.

charge valves, should be cold water of therequired temperature. Thiscold water is preferably delivered to the cylinder throu 11 ports 16above the piston at the end of t e downward stroke of the piston andpreferably taken from the discharge of pump F, in which case, because ofits temperature as water of condensation, it is important to cool itto.the required temperature before it is. delivered above the )iston. Inthe construction shown, this liquid is taken from the discharge chamber13 of pump F by pipe 20 and passed through a cooler and then suppliedthrough pipe 21 to air suction chamber 15, the amount of water suppliedpreferably being regulated by cock22. The cooler may be of any suitableconstruction, but as shown the water from pipe 20 passes through outertubes 1 which are cooled by inner tubes 2 supplied with cold circulatingwater by the pump E through pipe 23 connecting with the circulating pumpdelivery 0, this water returning to the suction (Z of pump E throughpipe 24. As shown, this cooled water of condensation is used also forsealing and cooling the gland of the pump piston rod, water beingsupplied through pipe 25 controlled by cock 26 to the gland ring 27.

The construction shown in Fig. 2 is the same as that shown in Fig. 1,except that the air and uncondensed vapor pass from the condenserthrough tail pipe B with the wa-' ter of condensation, and are separatedat the suction chamber 10, the water of condensa tion passing. intocylinder F below the piston throughvalves 11, as in Fig. 1, and the airand uncondensed vapor passing upward through passage :28 to suctionchamber 15, as common in this class of dry and wet air pumps. v

As shown in Fig. 3, the airand uncondensed vapor are taken off throughpipe 0 and the water of condensation through tail pipe B, as in Fig. l,but the pump is made horizontal and is shown as driven by an engine ofthe rotative type but which may be direct-acting as in the otherconstructions. In this construction, the air suction chamber 15 andports 16 are shown as placed on the upper side of the pump, whichusually is preferable, and the delivery passage by which the air istransferred to the water side of the piston is shown as on the lowerside of the pump, but it may be on the side or 'top to avoid collectionof water if this is found preferable in any case. The suction valves 3,and force valves 4, at the water end of the pump, are preferably placedhorizontally in valve chamber 29, and the air dis charge valves 5 areplaced horizontally in cylinder.

It will be seen that the invention provides a vacuum pumping apparatusby which a high volumetric efliciency is secured and a high ceiving anddischarging air and uncondensed vapor at one end of the cylinder andliquid at the other end of the cylinder,.and

valve chambers on the opposite head of the a passage connecting theoutlet of the air end of the cylinder withthe water end of the cylinderwhereby the air is delivered from the air. end of the cylinder against areduced pressure in the water end and finally delivered with the water.

2. In a condenser system, the combination with the condenser, of a pumphaving its cylinder connected to the condenser for receiving anddischarging air and uncondensed vapor at one end of the cylinder andliquid at the other end of the cylinder, a passage connecting the outletof the air end of the cylinder with the water end of the cylinderwhereby the air is delivered from the air end of the cylinder against areduced pressure in the water end and finally delivered with the water,and connections for supplying sealing water to the air end of thecylinder.

3. In a condenser system, the combination with the condenser, of a pumphaving its cylinder connected to the condenser for receiving anddischarging air and uncon densed vapor at one end of the cylinder andliquid at the other end of the cylinder, a passage connecting the outletof the air end of the cylinder with the water end of the cylinderwhereby the air is delivered from the air end of the cylinder against areduced pressure in the water end and finally delivered with the water,and a by-pass through which water from the water end is delivered to theair end on the air suction stroke of the piston.

ered with the water, a by-pass through 4. In a condenser systennthecombination with the condenser, of a pump having ts cylinder connectedto the condenser for receivlng and discharging air and unconthe air endof the cylinder againsta reduced pressure in the water end and finallydelivwhich water from the water end is delivered to the air' end on theair suction stroke of the piston, and a cooler on said by-pass.

5. In a condenser system the combination with the condense yof a pumphaving ts cylinder connected to the condenser for receiving anddischarging air and uncondensed vapor at one end of thecylinder andliquid at the other end of the cylinder,'a

passage connecting the outlet of the air end of the cylinder with thewater end of the cylinder whereby the air is delivered from.

the air endof the cylinder against a reduced pressure in the water endand finally delivered with the water, a by-pass through which water fromthe water end is delivered to the air end on the air suction stroke ofthe piston, a surface cooler on said icy-pass,-

and connections for supplying cooling water to said cooler from thecondenser cold water having its cylinder port controlled by the pistonand opened at or near the end of its upward stroke.

7. In a condenser system of that class in which the air and uncondensedvapor are withdrawn from the condenser separately from the dischargewater, the combination with the condenser, of a vertical pump cylinder,an air passage connecting the upper end of the cylinder with thecondenser and having a valveless piston-controlled inlet, a waterpassage connecting the lower end of the cylinder with the condenser andhaving a valved inlet, a valved air outlet at the top of the cylinder, avalved water outlet at the bottom of the cylinder, and a passageconnecting the air outlet with the waterend of the cylinder and havingits cylinder port controlled by the piston and opened by the latter ator near the end of its upward stroke.

8. In a condenser system of that class in which the air and uncondensedvapor are withdrawn from the condenser separately from the dischargewater, the combination with the condenser, of a vertical pump cylinder,an air passage connecting the upper end of the cylinder with thecondenser and having a valveless piston-controlled inlet,-a

water passage connecting the lower end of the cylinder with thecondenser and having a valved inlet, a valved air outlet at the top ofthe cylinder, a valved water outlet atthe bottom of the cylinder, apassage connecting the air outlet with the water end of the cylinder andhaving'its cylinder port con trolled bythe piston and. opened by thelatter at or near the end of its upward stroke, v

and a by-pass from the liquid discharge of i the cylinder to the airinlet. I '9. In a condenser system of'that class in which the air anduncondensed vapor are withdrawn from the condenser separately from thedischarge water, the combination with the condenser and itsair cooler,of a vertical pump cylinder, an air passage connecting the upper end ofthe cylinder withthe air. cooler and having a valveless pistoncontrolledinlet, a water passage connecting the lower end of the cylinder with thecondenser and having a valved inlet, a valved air outlet at the top ofthe cylinder, a valved water outlet at the bottom of the cylinder, apassage connecting the air outlet with the water end ofthe cylinder andhaving its cylinder port controlled by the piston and opened by thelatter at or near the end of its upward stroke, a bypass from the liquiddischarge ofthe cylinder to the air inlet, and a cooler on said by-pass.

10. A vacuum pumphaving its cylinder provided -with inlets and outletsat opposite ends for receiving and delivering air at one end of thecylinderv and liquid at the other end of the cylinder, and apassage'connecting the air outlet at the air end of the cylinder withthe water end of the cylinder, whereby the air is delivered from the airend against the reduced pressure of the water end and finally deliveredwith the water. i

11. A vacuum provided-with inlets and outlets at opposite ends forreceiving and delivering air at one end of the cylinder and liquidat theother end of the cylinder, a passage connecting the air outlet at theair end of the cylinder with the water end of the cylinder, whereby theair is delivered from the air end against the reduced pressure of thewater end and finally delivered with the water, and a bypass connectingthe water delivery with the air end.

12. A vacuum pump having its cylinder provided with inlets and outletsat opposite ends for receiving and delivering air atone end of thecylinder and liquid at the other pump having its cylinder end of thecylinder, a passage connecting the air outlet at the air end of thecylinder with the water end of the cylinder, whereby the air isdelivered from the air end against the reducml pressure of the 1 waterend and finally delivered wit-lithe water, a hy-pass connectingthe waterdelivery with the air end, and a cooler on the by-pass.

1.3. A vacuum pump having its cylinder provided with. a suctionvalveless pistoncontrolled air inlet and valved air discharge at one endof the 'cylinden'a valved water inlet and valved water discharge at theopposite end of thev cylinder, and a passage connecting the ai outletwith the water end of the cylinder, said passage having its cylinderinlet controlled by the piston and posi-r tioned to be opened by thepiston at or near the end of the water suction stroke of the piston. i

14:. A provided with a suction valveless piston-controlled air'inlet andvalved air discharge at one end of the cylinder, a valved water inletand valved water discharge at the opposite end of the c linder, apassage connecting the air outlet with the water end of thecylinder,

vacuum pump having itscylinder said passage having its cylinder inletcon-" trolledhy the piston and, positioned to be opened by the piston ator near the end of the water suction strokeof the 'piston,'anda by-passconnecting the liquidzdischarge with the air inlet for supplying waterto the air end when the air inlet is opened-by the piston.

inlet for supplyingwater t-o'the air end when the air inlet is opened bythe piston, and. a cooler on the by-pass.

In testimony whereof I have hereunto set my hand.

PHILLIPS P.'BOURNE;

A vacuum pump having its cylinder 7 ]')lOV1(lG(l with a suctionvalveless PlStOIl-COII-

